摘要
鹤大高速是"7918"公路网纵贯线中的一支。其自然区划属于季冻区,气候特点是冬严寒、夏酷暑,沥青路面结构会较早出现高温或低温病害,这严重影响其路用性能及经济性。我国的沥青路面设计规范中设计指标体系面向全总区域适用,没有针对季冻区的专门措施。文中结合鹤大高速沿线自然条件,选择6种典型沥青路面结构,采用BISAR中的应力应变模块计算结构在重载作用下的7种荷载响应。采用灰理论建立灰关联空间,通过形成差异信息空间,确定环境参数,计算出灰关联系数及灰关联度。以路表设计弯沉值代表路面结构性能,各荷载响应与路表弯沉值间的灰关联度即代表某一指标对结构路用性能的影响程度。通过这一方法,找出各设计参数对于路用性能影响程度的排序,形成针对季冻区的"国标+"设计指标体系。
Hegang-Dalian Expressway is one branch of the＂7918＂highway network who is located in seasonally frozen area,with extreme low temperature in winter and high temperature in summer.These make the asphalt pavement structure subject to early diseases and influence its road performance and economy seriously.The current design specification of asphalt pavement in China has no special measures to deal with this.In this paper,according to the pavement structure of Hegang-Dalian Expressway,six types typical asphalt pavement structures are selected,seven categories heavy load response have been calculated by the stress strain modulus calculation structure in software BISAR.Grey theory is adopted to establish the grey relational space and difference information space,environmental parameters are selected,and grey relational coefficient and grey correlation degree are eventually calculated.Road deflection value is selected to represent the road performance,and the value of grey correlation degree can reflect the degree of influence.With this method,supplementary design parameters of asphalt pavement in seasonally frozen area form a＂GB＋＂design system.
出处
《公路》
北大核心
2016年第6期41-44,共4页
Highway
关键词
沥青路面
季冻区
灰理论
差异信息空间
灰关联度
国标+
seasonal frozen area
grey theory
differential information space
grey correlation degree
GB＋
